A study on the interaction of three anionic mesotetrakis (4-sulfonatophenyl) porphyrins using small-angle X-ray scattering (SAXS) and electron paramagnetic resonance (EPR) is performed. The SAXS showed that on addition of all porphyrins, the HSP micelle of prolate shape reduces its axial ratio from 1.8+-0.2 to 1.5+-0.1 and proves that micellar hydrophobic core is affected by porphyrins incorporation and is independent of the type of porphyrin and pH.

Counteranion dependent protonation and aggregation of tetrakis(4-sulfonatatophenyl)porphyrin in organic solvents

Article Abstract:

The tetrabutylammonium salt of 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin (TPPS) is soluble in dichloromethane, and the general properties of these compound was investigated as function of various added acids. On increasing the acid concentration in these latter solutions, fully protonated species are formed that eventually start to aggregate.

A new polychromophoric complexes, where different porphyrin (P) derivatives are covalently coupled to a redox active Mo center, MoL*(NO)Cl(X) (L* is the face-capping tridentate ligand tris(3,5-dimethylpyrazolyl) hydroborate and X is a phenoxide/pyridyl/amido derivative of porphyrin) is reported.